composer.json

{
    "repositories": [
        {
            "type":"composer",
            "url":"http://wpackagist.org"
        },
        {
            "type": "package",
            "package": {
                "type": "webroot",
                "name": "wordpress/wordpress",
                "version": "3.6",
                "dist": {
                    "url": "https://github.com/WordPress/WordPress/archive/3.6.zip",
                    "type": "zip"
                },
                "require": {
                    "fancyguy/webroot-installer": "1.0.0"
                }
            }
        }
    ],
    "require": {
        "rmccue/requests": "dev-master",
        "wp-cli/wp-cli": "dev-master",
        "wordpress/wordpress": "3.6",
        "wpackagist/advanced-custom-fields": "*",
        "wpackagist/custom-post-type-ui": "*"
    },
    "extra": {
        "installer-paths": {
            "app/plugins/{$name}/": ["type:wordpress-plugin"],
            "app/themes/{$name}/": ["type:wordpress-theme"]
        },
        "webroot-dir": "wp",
        "webroot-package": "wordpress/wordpress"
    }
}